TITLE: HP Tru64 UNIX - Potential Panics in CFS During Low Memory Conditions Copyright (c) Hewlett-Packard Company 2006. All rights reserved. PRODUCT: HP TruCluster Server [R] V5.1B-2 SOURCE: Hewlett-Packard Company ECO INFORMATION: ECO Name: TCRKIT1000415-V51BB25-E-20060222 ECO Kit Approximate Size: 3.55MB Kit Applies To: HP TruCluster Server V5.1B-2 PK4 (BL25) ECO Kit CHECKSUMS: /usr/bin/sum results: 61545 3640 /usr/bin/cksum results: 2026687418 3727360 MD5 results: 4b57888a3f5272c4892d0cdea0f3bb51 SHA1 results: 3a00d5fa45d6af206681cd3985a1843ddfc3adb1 ECO KIT SUMMARY: A dupatch-based, Early Release Patch kit exists for HP TruCluster Server V5.1B-2 that contains solutions to the following problem(s): This patch prevents a variety of panics that may occur during low memory conditions when an error occurs during a cfs write. The panics seen to date are: Kernel Memory Fault in simple_lock via cfs_rwvp_cache Unaligned Access in msfs_putpage Assert Failed: brp->br_allocated>=0 PANIC: pg_hold - underflow Kernel Memory Fault in cfs_delay_adjust The stack traces of the panicing threads are: KMF - simple_lock via cfs_rwvp_cache 4 panic 5 trap 6 _XentMM 7 simple_lock 8 cfs_rwvp_cache 9 cfs_cachewrite 10 cfs_write 11 vn_write 12 rwuio 13 write 14 syscall 15 _Xsyscall UNA 4 panic 5 afault_trap 6 _XentUna 7 msfs_putpage 8 ubc_msync 9 cfs_ubc_msync 10 ubc_msync 11 u_map_control 12 msync 13 syscall 14 _Xsyscall ASSERT FAILED 4 panic 5 cfsdb_assert 6 cfscall_writepages 7 cfs_do_bio 8 cfs_strategy 9 cfs_rwblk 10 cfs_rwvp_cache 11 cfs_cachewrite 12 cfs_write 13 vn_write 14 rwuio 15 write 16 syscall 17 _Xsyscall PG_HOLD UNDERFLOW 1 panic 2 ubc_page_release 3 cfs_rwvp_cache 4 cfs_cachewrite 5 cfs_write 6 vn_pwrite 7 prwuio 8 pwrite 9 syscall 10 _Xsyscall KMF - in cfs_delay_adjust 1 panic 2 trap 3 _XentMM 4 cfs_delay_adjust 5 cfs_rwvp_cache 6 cfs_cachewrite 7 cfs_write 8 vn_write 9 rwuio 10 write 11 syscall 12 _Xsyscall The Patch Kit Installation Instructions and the Patch Summary and Release Notes documents provide patch kit installation and removal instructions and a summary of each patch. Please read these documents prior to installing patches on your system. The patches in this ERP kit will also be available in the next mainstream patch kit - HP TruCluster Server V5.1B-4. INSTALLATION NOTES: 1) Install this kit with the dupatch utility that is included in the patch kit. You may need to baseline your system if you have manually changed system files on your system. The dupatch utility provides the baselining capability. 2) The patch in this ERP kit does not have any file intersections with any other ERP available at this time for this product version. 3) This ERP kit will NOT install over any Customer Specific Patches (CSPs) which have file intersections with this ERP kit. Contact your normal Service Provider for assistance if the installation of this ERP kit is blocked by any of your installed CSPs. INSTALLATION PREREQUISITES: You must have installed HP TruCluster Server V5.1B-2 PK4 (BL25) prior to installing this Early Release Patch Kit. SUPERSEDE INFORMATION: None KNOWN PROBLEMS WITH THE PATCH KIT: None. RELEASE NOTES FOR TCRKIT1000415-V51BB25-E-20060222: Release Notes This document summarizes the contents and special instructions for the TruCluster Server V5.1B patches contained in this kit. For information about installing or removing patches, baselining, and general patch management, see the Patch Kit Installation Instructions document. 1 Release Notes This Early Release Patch Kit Distribution contains: - fixes that resolve the problem(s) reported in: o TR_G09581 * for TruCluster Server V5.1B T64V51BB25AS0004-20040616.tar (BL25) This kit includes a patch which requires system reboot. The patches in this kit are being released early for general customer use. Refer to the Release Notes for a summary of each patch and installation prerequisites. Patches in this kit are installed by running dupatch from the directory in which the kit was untarred. For example, as root on the target system: > mkdir -p /tmp/CSPkit1 > cd /tmp/CSPkit1 > > tar -xpvf DUV40D13-C0044900-1285-20000328.tar > cd patch_kit > ./dupatch 2 Special Instructions SPECIAL INSTRUCTIONS for TruCluster Server V5.1B Patch C142.01 3 Summary of CSPatches contained in this kit TruCluster Server V5.1B PatchId Summary Of Fix ---------------------------------------- C142.01 Fix KMF on remote write to nearly full domain 4 Additional information from Engineering None 5 Affected system files This patch delivers the following files: TruCluster Server V5.1B Patch C142.01 ./usr/opt/TruCluster/sys/cfs.mod CHECKSUM: 01475 1479 SUBSET: TCRBASE540 [R] UNIX is a registered trademark in the United States and other countries licensed exclusively through X/Open Company Limited. Copyright Hewlett-Packard Company 2006. All Rights reserved. This software is proprietary to and embodies the confidential technology of Hewlett-Packard Company. Possession, use, or copying of this software and media is authorized only pursuant to a valid written license from Hewlett-Packard or an authorized sublicensor. This ECO has not been through an exhaustive field test process. Due to the experimental stage of this ECO/workaround, Hewlett-Packard makes no representations regarding its use or performance. The customer shall have the sole responsibility for adequate protection and back-up data used in conjunction with this ECO/workaround.